Microstructure and dielectric properties of Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 composite ceramics

Zhiqiang Li; Feng Gao; Guoxin Hu; Jinjin Li; Xixi Huang

doi:10.7521/j.issn.0454-5648.2014.03.04

Microstructure and dielectric properties of Ba(Zn_1/3Nb_2/3)O₃ - ZnNb₂O₆ composite ceramics

Zhiqiang Li, Feng Gao, Guoxin Hu, Jinjin Li, Xixi Huang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Ba(Zn_1/3Nb_2/3)O₃ - ZnNb₂O₆ (BZNZ) ceramics were fabricated via a conventional electric ceramic process. The effect of Ba(Zn_1/3Nb_2/3)O₃ (BZN) on the microstructure and dielectric properties of BZNZ ceramics was investigated. The results show that the introduction of BZN increases the sintering temperature of BZNZ ceramics. A phase of BaNb_3.6O₁₀ appears in the ceramics besides ZnNb₂O₆ and Zn₃Nb₂O₈. The microwave dielectric properties of the BZNZ ceramics were measured. The dielectric constant increases, the value of Q×f firstly increases and then decreases and the temperature coefficient of resonance frequency τ_f shifts to a positive value when the content of BZN increases. The ceramic with the BZN content of 30% (in mole) has the optimal dielectric properties, i.e., ε_r=30.76, Q×f=29600 GHz, tan δ=1.98×10^-4, and τ_f=-2.34×10^-6/°C.

Original language	English
Pages (from-to)	280-285
Number of pages	6
Journal	Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Volume	42
Issue number	3
DOIs	https://doi.org/10.7521/j.issn.0454-5648.2014.03.04
State	Published - Mar 2014

Keywords

Barium zinc niobate
Composite ceramics
Dielectric properties
Microstructure
Zinc niobate

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10.7521/j.issn.0454-5648.2014.03.04

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title = "Microstructure and dielectric properties of Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 composite ceramics",

abstract = "Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 (BZNZ) ceramics were fabricated via a conventional electric ceramic process. The effect of Ba(Zn1/3Nb2/3)O3 (BZN) on the microstructure and dielectric properties of BZNZ ceramics was investigated. The results show that the introduction of BZN increases the sintering temperature of BZNZ ceramics. A phase of BaNb3.6O10 appears in the ceramics besides ZnNb2O6 and Zn3Nb2O8. The microwave dielectric properties of the BZNZ ceramics were measured. The dielectric constant increases, the value of Q×f firstly increases and then decreases and the temperature coefficient of resonance frequency τf shifts to a positive value when the content of BZN increases. The ceramic with the BZN content of 30% (in mole) has the optimal dielectric properties, i.e., εr=30.76, Q×f=29600 GHz, tan δ=1.98×10-4, and τf=-2.34×10-6/°C.",

keywords = "Barium zinc niobate, Composite ceramics, Dielectric properties, Microstructure, Zinc niobate",

author = "Zhiqiang Li and Feng Gao and Guoxin Hu and Jinjin Li and Xixi Huang",

year = "2014",

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doi = "10.7521/j.issn.0454-5648.2014.03.04",

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T1 - Microstructure and dielectric properties of Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 composite ceramics

AU - Li, Zhiqiang

AU - Gao, Feng

AU - Hu, Guoxin

AU - Li, Jinjin

AU - Huang, Xixi

PY - 2014/3

Y1 - 2014/3

N2 - Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 (BZNZ) ceramics were fabricated via a conventional electric ceramic process. The effect of Ba(Zn1/3Nb2/3)O3 (BZN) on the microstructure and dielectric properties of BZNZ ceramics was investigated. The results show that the introduction of BZN increases the sintering temperature of BZNZ ceramics. A phase of BaNb3.6O10 appears in the ceramics besides ZnNb2O6 and Zn3Nb2O8. The microwave dielectric properties of the BZNZ ceramics were measured. The dielectric constant increases, the value of Q×f firstly increases and then decreases and the temperature coefficient of resonance frequency τf shifts to a positive value when the content of BZN increases. The ceramic with the BZN content of 30% (in mole) has the optimal dielectric properties, i.e., εr=30.76, Q×f=29600 GHz, tan δ=1.98×10-4, and τf=-2.34×10-6/°C.

AB - Ba(Zn1/3Nb2/3)O3 - ZnNb2O6 (BZNZ) ceramics were fabricated via a conventional electric ceramic process. The effect of Ba(Zn1/3Nb2/3)O3 (BZN) on the microstructure and dielectric properties of BZNZ ceramics was investigated. The results show that the introduction of BZN increases the sintering temperature of BZNZ ceramics. A phase of BaNb3.6O10 appears in the ceramics besides ZnNb2O6 and Zn3Nb2O8. The microwave dielectric properties of the BZNZ ceramics were measured. The dielectric constant increases, the value of Q×f firstly increases and then decreases and the temperature coefficient of resonance frequency τf shifts to a positive value when the content of BZN increases. The ceramic with the BZN content of 30% (in mole) has the optimal dielectric properties, i.e., εr=30.76, Q×f=29600 GHz, tan δ=1.98×10-4, and τf=-2.34×10-6/°C.

KW - Barium zinc niobate

KW - Composite ceramics

KW - Dielectric properties

KW - Microstructure

KW - Zinc niobate

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Microstructure and dielectric properties of Ba(Zn_1/3Nb_2/3)O₃ - ZnNb₂O₆ composite ceramics

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